At a major climate meeting in Poland, nearly 200 countries are trying to reach a deal on dramatically reducing carbon emissions. But a recent U.N. report found that may not be enough to avoid dangerous impacts from the warming climate. In fact, the world is falling so far short of what's needed, it said, that it may be necessary to pull massive amounts of carbon dioxide out of the air.

Angela Lautner knew her thirst was unusual, even for someone directing airplanes, outside in the Memphis summer heat.

"We had coolers of Gatorade and water for people to always have access to," Lautner remembers of her job as a ground services agent. "But the amount of thirst that I felt was just incredible."

She had no appetite and she lost an unusual amount of weight. Then after a trip to the emergency room, Lautner, who was 22, was diagnosed with Type 1 diabetes. The diagnosis was life changing.

We know we need to exercise for our health, but a lifelong exercise habit may also help us feel younger and stay stronger well into our senior years. In fact, people in their 70s who have been exercising regularly for decades seem to have put a brake on the aging process, maintaining the heart, lung, and muscle fitness of healthy people at least 30 years younger.

Last week in the Russia investigations: The special counsel ties up loose ends, but that may not mean the finish line is any closer.

Endings and beginnings

Never mind that it still isn't fully clear what the Russia imbroglio is — what picture all the puzzle pieces are supposed to form when they're put together.

An even more basic question that's just as difficult to answer is: How much longer will it go?

Just outside Charlottesville, Va., the roads lose their markings as they wind through the woods, passing an occasional church, a cemetery and a plantation known as Highland, owned by America's fifth president James Monroe. For the first time in its 225-year history, the site has begun telling the stories of the African-American men and women who were enslaved there, and consulting with their descendants.